Electric lighting device



May 17, 1938. DOUGLAs 2,117,761

ELECTRIC LIGHTING DEVICE Filed April 4, 1936 4 Sheets-Shet 1 is lN Tog TZMJ, ,MMM

ATTORNEYS 1938. v H. DOUGLAS I 2,117,761

ELEQTRIC LIGHTING DEVICE 7 Filed April 4 1936 4 Sheets-Sheet 2 k N ME Harm's A. D02 1 1N VN TOR 172M,

.A-TTORNEYs y 1938- v H. A. DOUGLAS 2,117,761

ELEC'I'R I C LIGHTING DEVICE Filed April 4, 1936 4 Sheets-Sheet E5 Harts A-nousias Patented May 17, 1938 UNITED STATES ELECTRIC LIGHTING DEVICE Harry A. Douglas, Bronson, Mich, assignor to Kingston Products Corporation, a corporation of Indiana Application April 4, 1936, Serial N0. 72,780

35 Claims.

have shown, for purposes of illustration, several forms which my invention may assume. In these drawings:

Figure 1 is a vertical sectional view, certain parts being fragmentarily shown, of one embodiment of my invention,

Figure 2 is a fragmentary rear elevation of a detail of Figure 1,

Figure 3 is a front elevation of a detail,

Figure 4 is a section taken on the line 4-4 of Figure 3, looking in the direction of the arrows,

Figure 5 is a front elevation, partly in section, of a lamp used in the embodiment of Figure 1,

Figure 6 is a fragmentary front elevation of a mounting or reflector used in the embodiment of Figure 1,

Figure 7 is a section taken on the line 'I! of" Figure 1, looking in the direction of the arrows,

Figure 8 is a fragmentary sectional view taken on the line 8-8 of Figure 'I, looking in the direction of the arrows,

Figure 9 is a fragmentary sectional view taken on the line 9-9 of Figure 7, looking in the direction of the arrows,

Figure 10 is a vertical sectional view, certain parts being fragmentarily shown, of another embodiment of my invention,

Figure 11 is a front elevation, partly in section, of a lamp used in the embodiment of Figure 10,

'Figure 12 is a fragmentary front elevation of a mounting or reflector used in the embodiment of Figure 10,

Figure 13 is a section taken on the line I3l3 of Figure 10,,looking in the direction of the arrows,

Figure 14 is a fragmentary sectional view taken on the line l4l4 of Figure 13, looking in the direction of the arrows,

Figure 15 is-a vertical sectional view, certain parts being fragmentarily shown, of another embodiment of my invention, along with a side elevation of a line connector which may be used in said embodiment,

Figure 16 is a front elevation, partly in section, of a lamp used in the embodiment of Figure 15,

Figure 17 is a fragmentary rear elevation of a detail of the lamp of Figure 16,

Figures 18 and 19 are sections taken respectively on the lines l8--I8 and l9-I9 of Figure 15, looking in the direction of the arrows,

Figure 20'is a fragmentary front elevation ofa mounting or reflector used in the embodiment of Figure 15,

Figure 21 is a section taken on the line 2l-2l of Figure 15, looking in the direction of the arrows,

Figure 22 is a fragmentary sectional view taken on the line 22-42 of Figure 21, looking in the direction of the arrows,

Figure 23 is a vertical sectional view, certain parts being fragmentarily shown, of another embodiment of my invention,

Figure 24 is a front elevation, partly in section, of a lamp used in the embodiment of Figure 23,

Figure 25 is a fragmentary front elevation of a mounting or reflector used in the embodiment of Figure 23,

Figure 26 is a section taken on the line 26-26 of Figure 23, looking in the direction of the arrows,

Figure 27 is a fragmentary sectional view taken on the line 2121 of Figure 26, looking in the direction of the arrows,

Figure 28 is a side elevation of the lamp shown in Figure 24, assembled with a line connector or contact carrier,

Figure 29 is a fragmentary sectional view taken on the line 29-29 of Figure 26, looking in the direction of the arrows, and

Figure 30 is a front elevation of a line connector or contact carrier which may be used in the embodiment of Figure 23.

Referring to Figure 1, the embodiment of my invention here illustrated is shown as including an incandescent electric lamp 40, adapted to be suitably connected to a mounting, the mounting being in this instance a reflector 4| fragmentarily shown. The lamp is provided with a base 42, having a shell 43, which in this instance includes a lateral extension 44 comprising positioning means 45 combined with a biasing means 46 for biasing the positioning means 45 against the mounting 4 I. The positioning means 45 is adapted to abut the front surface of the reflector 4|, whereas the biasing means is adapted to abut a rear surface of the reflector, as will more fully appear. By front is meant that side of a part presented toward the light producing source of the lamp 40 and by rear the opposite side. The lateral extension 44 of the base comprises a collar 41 surrounding the shell 43 and a radially extending flange 48 on the collar. The collar 41 may be fastened to the shell 43 in any suitable manner, as by solder 49. The flange 48 is here shown as continued radially outwardly in the form'of three sectoral projections 58, 5|, 52

'(forming part of the positioning means 45), un-

equally circumferentially spaced, the axes of symmetry of the upper sectoral projections, 5|,

52, as viewed in Figure 5, being here shown as less than 120 apart, and the axis of symmetry of the lower sectoral projection, 58, approximately bisecting the angle between the axes of symmetry of the upper sectoral projections, 5|, 52. The peripheral arcs of the sectoral projections 58, 5|, 52 define a circle, and are here shown as unequal, the peripheral arc of the sectoral projection 52 being the smallest, and that of the sectoral projection 5| being larger, and that of the sectoral projection 58 being the largest. Here shown as spaced circumferentially equal distances from the nearest margins of the sectoral projections 5|, 52, are axially rearwardly extending projections 53, conveniently formed by making indentations 54 on the front surfaces of the sectoral projections. The lower sectoral projection, 58, is also provided with an axially Offset rearwardly and interposed circumferentially between the sectoral projections 58, 5|, 52 are three resilient fingers 55, 56, 51, forming part of the biasing means 46, integrally joined to the flange 48 by connecting portions 58. The outer peripheries of the fingers 55, 56, 51 are here shown as defining a circle of the same diameter as that defined by the positioning means 45. The outer ends of the fingers 55, 56, 51 are of generally sectoral form, as here shown, and the axes of symmetry of the lower fingers, 55, 51, are spaced more than 120 apart, and the axis of symmetry of the upper finger, 56, approximately bisects the angle between the axes of symmetry of the lower fingers, 55, 51. The lower fingers, 55, 51, are of the same general width circumferentially, whereas the width of the upper finger,

tending dome-shaped projection or detent 59,

conveniently formed by making an indentation 68 in the opposite side of the finger. This detent 59 is approximately circumferentially half-way between the axial projections 53. Spaced at approximately equal angles clockwise and counterclockwise from the axial projection 53 on the lower sectoral projection, 58, the fingers 55, 51 are here shown as respectively provided with dome-shaped frontwardly extending detents 59, identical with the detent 59 of the finger 56. The detents 59 are here shown as concyclic with each other and with the axial projections 53.

One of the fingers, 51, is here shown as provided with a lug I85 bent frontwardly out of a lateral margin of the finger.

The lamp 48 is here shown as provided with a pair of butt-type contacts 6|, 62 which are cooperable with a pair of contacts 63, 64 on a contact carrier 65. The contact carrier 65 is here shown as comprising a generally cylindrical shell 66 provided at its front end with a radially extending generally annular flange 61 having unequally circumferentially spaced arms 68 extending in a generally radial direction from its periphcry. The arms 68 are provided with axially frontwardly extending arcuate portions 69, these arcuate portions defining a cylinder. The free ends of the arcuate portions 69 are formed into hooks 18, 1|, 12. One of the hooks, 1|, is most clearly shown in Figure 4, and as these hooks 18, 1|, 12 are all identical, a description of one of them will serve for all. The hook 1| has a throat 13, narrower than the circumferential width of the arcuate portion 69. The bottom 14 of the mouth 15 of the hook is V'-shaped, formed by margins 16, 11 meeting at an angle. The free end of the throat of the hook is here shown as formed by a beveled margin 18, and the lip of the hook also has a beveled margin 19. The chin of the hook may also have a beveled margin 88.

The contact carrier 65 includes an insulating member 8| having an outside diameter such asto fit within the shell 66, and having three circumferentially spaced radial projections 82, 83, 84 adapted to fit three axially extending recesses 85, 86, 81 in the rear end of the shell. The projection 82 and recess 85 may be larger than the other projections, 83, 84, and recesses, 86, 81, so that the insulating member 8| may be assembled with the shell 66 in but one relative rotative relation. In order to hold the insulating member 8| assembled with the shell 66 a plurality of fingers 88, in this instance four, extending rearwardly from the shell 66, may be provided, and clinched radially inwardly over the rear face of the insulating member.

The insulating member 8| carries the contacts 63, 64, these contacts being desirably formed as enlarged heads on shanks fitted over and swedged to the ends of conductors 89, 98 respectively. The conductors 89, 98 are disposed in sleeves, each sleeve 9| being slidable within a bushing 92, which is fixedly mounted, in any suitable manner, as by heading, on the insulating member 8|. Each sleeve 9| is surrounded by a spring 93 between its bushing and a flange 94 on each sleeve abutting the respective contacts 63, 64.

The contacts 63, 64 are adapted to make contact respectively with the contacts 6|, 62 on the lamp base when the contact carrier 65 is assembled with the reflector 4|, as shown in Figure 1. The springs 93 serve to bias the hooks 18, 1|, 12 into cooperative relation with the reflector.

The provision of a plurality of contacts GI, 62 on the lamp enables the use of a multiple filament lamp, the lamp being here shown as provided with two filaments, one of which, 95, may desirably have" its lighting center at some predetermined point with respect to the reflector, as for example at the focus, and the other of which, 96, may be displaced from the filament 95, and may be used for providing dim or so-called tilted light. The filaments 95, 96 have their terminals connected in a well known manner to the lamp base shell,

43 and to the contacts 6|, 62 on the lamp base. The passage of current to either one or both of the filaments 95, 96 may be controlled in any suitable manner, as by switching means (not shown) interposed in the conductors 89, 98.

The reflector 4| is here shown as provided with a rearwardly extending pocket 91 having a cylindrical portion 98 terminating in a fiat end flange 99. The diameter of the inner periphery of the cylindrical portion 98 is here shown as such that it will gage, that is, snugly fit, the outer peripheries of the sectoral projections 58, 5|, 52 of the positioning means 45, when the axial projections 53 are in abutment with the front face of the end flange 99, as shown in Figure 1. The end flange 99 of the reflector is here shown as provided with a central aperture I00, and there are three re cesses IOI, I02, I03 extending radially outwardly from the margin of the aperture I00, to the inner periphery of the cylindrical portion 98. The recesses IOI, I03 are here shown as more than 120 part, to the same angle as the fingers 55, 51, and the axis of symmetry of the recess I02 approximately bisects the angles between the axes of symmetry of the recesses IOI, I03. The recesses IOI, I02, I03 are so proportioned and so located that the sectoral ends of the fingers 55, 56, 51 will be able to pass through these recesses, and pass through them in but one relative rotative relation with respect to the reflector 4|. The end flange 99 is here shown as provided with three recesses or apertures I04 for cooperation with the detents 59 of the fingers 55, 55, 51. For

cooperation with the hooks 10, H, 12 of the contact carrier 65, the reflector M is here shown as provided with three compound arcuate apertures I06, I01, I08, in this instance disposed in the curved portion of the reflector 4I, radially outside of the pocket. Each of the compound apere tures I06, I01, I08 includes a larger, entrance portion I09 and a smaller portion II 0, spaced circumferentially from the entrance portion I09 to form a seat III for the respective cooperating hook. The compound apertures I05, I01, I08 are here shown as of the same radial extent as that of. the thickness of the hooks.

The contact carrier 65 may be assembled with the reflector H by inserting the hooks 10, H, 12 through the entrance portions I09 of the compound apertures I06, I01, I08 and rotating the contact carrier 65 slightly clockwise, as viewed from the rear of the reflector, until the parts are brought to the position shown in Figures 1, '1, and 9, in which the margins of the seats III are engaged by the margins 16, 11 of the bottoms of the mouths of the hooks 10, 1|, 12.

The lamp 40 may be assembled with the reflec-, tor 4| as follows.

The lamp 40 is brought to .a position coaxial with the aperture I00 of the reflector, at the front of the reflector, with its base presented toward the reflector. The lamp is then moved axially rearwardly, and is so positioned rotationally, that the fingers 55, 56, 51 will pass through the recesses IOI, I02, I03, against the bias of the springs 93. The lamp 40 is then moved further axially, the fingers 55, 56, 51 passing through the recesses IOI, I02, I03 and the axial projections 53 coming into contact with the front surface of the reflector end flange 99. The lamp 40 is then rotated clockwise, as viewed from the front of the reflector, thereby causing the detents 59 to engage the leading margins of the recesses IOI, I02, I03. Further clockwise rotation causes the detents 59 to ride up onto the rear surface of the end flange 99 and eventually to snap into the-apertures I04, bringing the parts to the position shown in Figure 7, in which the lug I05 is in engagement with a radial margin of the recess I03. It will be understood that when the detents 59 are seated on the margins of the apertures I04 in the position shown in Figures 1, 7, and 8, the fingers 55, 56, 51 are under sufficient stress to hold the axial projections 53 of the positioning means 45 in firm engagement with the front face of the end flange99.

The mode of disassembly of the lamp from the reflector will be obvious from the foregoing description of the mode of assembly.

The fingers 55, 51 may be made slightly wider circumferentially than the finger 56 so as to more nearly equalize the biasing action of the fingers on the axial projections 53.

The seats III are here shown as so positioned that when the lamp is mounted on the reflector H the axial projections 53 are in radial alinement with the seats I I I.

Since the positioning means 45 is accurately pre-positioned with respect to its distance from the filaments 95, 96, and the direction of the plane of the positioning means 45 is accurately pre-positioned with respect to the axis of the lamp 40, and furthermore, since the construction provides for predetermining the position of the lamp about its axis with respect to the reflector, the filament and also the auxiliary filament 96 will be positioned at the desired places with respect to the reflector. Itwill be furthermore noted that, due to the unequal circumferential spacing of the hooks 10, TI, 12 and the corresponding spacing of the compound apertures I06, I01, I08, the contact carrier 65 may be assembled with the reflector M, and therefore with the lamp 40, in but one relative rotative relation.

The positioning means 45 may be pre-positioned with respect to the lamp 40 by placing the positioning means on a. standard, with the shell 43 within the collar 41 and then adjusting the lamp until the lighting center of the desired filament is in a predetermined position, whereupon the collar is soldered to the shell 43. The position of the other filament of the lamp may be likewise simultaneously predetermined.

Referring to Figure 10, the embodiment of my invention here illustrated is shown as including an incandescent electric lamp 40a, adapted to be suitably connected to a reflector 4la fragmentarily shown. The lamp 40a is provided with a base 42a, having a shell 43a, which in this instance includes a lateral extension 44a comprising a positioning means 45a combined with a biasing means 46a for biasing the positioning means against the mounting. The positioning means 45a is adapted to abut a rear surface of the reflector 4Ia whereas the biasing means is adapted to abut a front surface of the reflector 4Ia, as will more fully appear. The lateral extension 44a of the base comprises a collar 41a surrounding the shell 43a, and a radially extending flange 480. on the collar 41a. The col1ar41a may be fastened to the shell 43a in any suitable manner, as by solder 49a. The flange 49a is here shown as continued radially outwardly in the form of three sectoral projections H2, H3, H4 (forming part of the positioning means 45a), unequally circumferentially spaced and as of unequal circumferential extent. Extending axially rearwardly from the sectoral projections I I 2, I I3, II4 are three arcuate flanges I I5, the outer peripheries of which define a cylinder. Extending radially outwardly from the rear margins of the arcuate flanges IIi are three secondary sectoral projections I I6, I I1, I I8. The radial axes of symmetry of the secondary sectoral projections II6, II 8 are here shown as less than apart and the radial axis of symmetry of the projection II1 approximately bisects the angle between the axes of symmetry of the projections H6, H8. The peripheral arcs of the secondary sectoral projections H6, H1, H8 define a circle, and are here Shown as not all equal, the peripheral arcs of the projections H6, H8 being equal, and that of the projection II1 being the larger than. that of either of the other two. Here shown as centrally disposed on the secondary sectoral projections H6, H1, II 8 are axially frontwardly extending projections 53a, conveniently formed by making indentations 54a on the rear surfaces of the projections H8, H7, H8. One of the secondary sectoral projections, I I8, is provided with a frontwardly extending lug Ia, on its right hand margin, as viewed in Figure 11.

In the general plane of and integral with the flange 48a and interposed circumferentially between the sectoral projections H2, H3, H4 are three radially extendinglflngers 55a, 56a, 51a. These fingers are here shown as of uniform width, and desirably have'arched portions H9 to increase their actual length, though their radial length is such that their peripheral margins are in the circle defined by the outer peripheries of the secondary sectoral projections H6, H1, H8. As here shown, the axes of symmetry of the fingers 55a, 51a are spaced less than 120 apart, to the same angle as the axes of symmetry of the secondary sectoral projections H6, H8, and the axis of symmetry of the finger 56a approximately bisects the angle between the axes of symmetry of the other'fingers, 55a, 51a. The fingers 55a, 56a, 51a are here shown as provided with centrally located rearwardly extending dome-shaped projections or detents 59a, conveniently formed by making indentations 60a in the opposite sides of the fingers.- The detents 59a are here shown as concylicwith each othe: and with the axial projections 53a.

The lamp 400. is here shown as provided with a pair of butt-type contacts Gm, 821; which are cooperable with a pair of contacts 63a, 84a on a contact carrier 65a. Thecontact carrier 85a is identical with the contact carrier 65 of the embodiment of\ Figures 1 through 9, except that when connected to the reflector Ma the hooks a, 1Ia, 12a are disposed 180 from the position assumed by the hooks I0, II, I2 of the contact carrier 85.

The reflector IIa is here shown as provided with a fiat portion I20. The diameter of the flat portion I is here shown as approximately the sameas the diameter of the outer periphery of the lamp baseextension a. The flat portion I20 of the reflector is here shown as provided with a central aperture I00a, of such diameter as will gage the peripheral surfaces of the arcuate flanges H5. Three recesses I2I, I22, I23 are provided, extending radially outwardly from the margin of the aperture I00a,to the outer periphery of the flat portion I20. The recesses I2I, I23 are here shown as less than 120 apart, to the same angle as the sectoral projections H6, H8, and the axis of symmetry of the recess I22 approximately bisects the angle between the axes of symmetry of the recesses I2I, I23. The recesses I2I, I22,'I23 are so proportioned and so located that the secondary sectoral projections H6, H1, H8 will be able to pass through these recesses, and pass through them in but one relative rotative relation with respect to the reflector lla. The flat portion I20 is here shown as provided with three recesses or apertures IBM for cooperation with the detents-59a of the fingers 55a,- 56a, 51a. For cooperation with the hooks 10a, Ha, 12a of the contact carrier the reflector is here shown as provided with three compound apertures I06a, I0Ia, I08a, identical with the compound apertures I06, I01, I08 of the reflector II shown in Figure 6, but so located that they will accommodate the hooks 10a, Ila, 12a of the contact carrier 55a in its position hereinbefore noted.

The lamp 400. may be assembled with the rebase presented toward the reflector. 40a is then moved axially rearwardly, and is so flector lla as follows. The lamp 40a is brought to a position coaxial with the aperture I00a of the reflector, at the front of the reflector, with its The lamp positioned rotationally, that the secondary sectoral projections -I I 8, H1, H8 will pass through the recesses I2I, I22, I23, against the bias of the springs 93a. The lamp 40a is then moved further axially, the projections H6, H1, H8 passing through receses I2I, I22, I23, and the arcuate flanges H5 slipping into the aperture M011, and the detents 59a coming into contact with the front surface of the flat portion I20 of the reflector. The lamp 400 is then moved rearwardly slightly, if that is necessary to cause the secondary sectoral projections H6, H1, H8 to clear the rear surface of the flat portion I20, and the lamp is then rotated clockwise, as viewed from the front of the reflector, thereby causing the axial projections 53a to ride onto the rear surface of the flat portion I20, and eventually causing the detents 59a to snap into the apertures I04a, bringing the parts to the position shown in Figures 10, 13, and 14, in which the lug I05a is in engagement with a radial margin of the recess I23. understood that when the detents 59a are seated on the margins of the apertures I04d in the position shown in Figures 10, 13, and 14, the fingers 55a, 56a, 51a. are under sufficient stress to hold the axial projections 53a of the positioning means 45a in firm engagement with the rear face of the flat portion I20.

As here shown the seats IHa are so located that when the lamp is assembled with the reflector, the axial projections 53a of the position- It will be ing means will be in radial alinement with the seats II'Ia.

For reasons already pointed out in connection with the embodiment of Figure 1, it will be evident that the filaments 95a, 96a of the lamp 40a will be accurately positioned with respect to the reflector 4 la, and the contact carrier 65a will bear the desired rotative relation to the reflector and lamp, when the parts are assembled as shown in Figures 10, 13, and 14.

Referring to Figure 15, the embodiment of my invention here illustrated is shown as including an incandescent electric lamp 40?), adapted to be suitably connected to a reflector lIb, fragmentarily shown. The lamp 401 is provided with a base 42b, having a shell 431), which in this instance also includes a lateralextension 441: comprising a positioning means 45b combined with a biasing means 45b for biasing the positioning means against the reflector. positioning means 45b is adapted to abut a front surface of the reflector MI) and the biasing means is adapted to abut a rear surface of the reflector. The lateral extension Mb comprises a collarA'ib surrounding the. shell 43b and a radially extend ing flange 4811 on the collar. The flange 48b is here shown as continued radially outwardly in In this instance the The peripheral arcs of the secondary projections I21, I28, I29 define a circle. The peripheral arcs of the projections I 21, I29 are equal, and that of the projection I28 is smaller than either of the other two. Here shown as disposed equal distances from one of the margins of the respective secondary sectoral projections I21, I28, I29 are axially rearwardly ext-ending projections 53b, conveniently formed bymaking indentations 54b in the front surfaces of theprojections I21, I28, I29.

Offset rearwardly and interposed circumferentially between the sectoral projections I24, I25, I26 are three radially extending fingers 55b, 56b, 51b integrally joined to the flange 481) by connecting portions 581). The outer, ends of the fingers 55b, 56b, 51b are of sectoral form, corresponding to the secondary sectoral projections I21, I28, I29. As here shown, the axes of symmetry of the fingers 55b, 51b are spaced more than 120" apart, to the same angle as the axes of symmetry of the secondary sectoral projections I21, I29, and the axis of symmetry of the finger 56b approximately bisects the angle between the axes of symmetry of'the other fingers 55b, 51b. The lower fingers, 55b, 51b, aregenerally of the same width circumferentially, whereas the width of the upper finger 56b is somewhat less. Here shown as disposed equal distances from one of the margins respectively of the sectoral ends of the fingers 55b, 56b, 511) are frontwardly extending dome-shaped projections or detents 59b, conveniently formed by making indentations 60b in the opposite. sides of the fingers. The detents 531) are here shown as concyclic with each other and with the axial projections 5317.

In order to make electrical connection with the lamp 40b, the lamp is here shown as provided with a pair of contacts I30, I3I in the form of spaced, axially extending plug terminals, of the snap type; and these plug terminals I30, I3I are here shown as of different cross-sectional diameter, but otherwise similar. Each plug terminal has a frustro-conical end portion I32 and an annular furrow I33 spaced somewhat from the frustro-conical end portion I32. Cooperable with the plug terminals I30, I3I is a line connector I34 of insulating material in which are disposed two sleeves I35, I36, as may be seen in Figure 18, the inside diameters of which correspond respectively to the outside diameters of the plug terminals I30, I3I, and which are spaced to cooperate with the plug terminals. Each conducting sleeve I35, I36 may be provided with a detent I31, struck inwardly from each sleeve, these detents being spaced from the left hand end of the connector I34, as viewed in Figure 15, and so designed that when the plug terminals I30, I3I are pushed into the left hand end of the line connector I34 the detents I31 will resiliently yield and slide up the frustro-conical end surfaces I32 of the respective plug terminals, and then snap into the annular furrows I33. The right hand end of the line connector I34 is here shown as provided with a pair of conducting sleeves I38 of the same diameter, and these sleeves may be respectively integral with the sleeves I35, I36 at the left hand end. The sleeves I38 at the right hand end may also be provided with detents I39 struck in from the sleeves and are thus cooperable with plug conductor terminals of the snap type, similar to those provided on the lamp base. The filaments 95b, 96b of the lamp 401) may be connected to the base 421) and to the lamp contacts I30, I3I,- and may be controlled in a manner as already described in connection with the lamp 40 and its contacts GI, 62.

The reflector MD is identical with the reflector is not provided with compound apertures such as the apertures I06, I01, I08. The central aperture I001) of the reflector MI) is of such diameter as will permit the circle-defining peripheral margins of the sectoral projections I24, I25, I26 to pass therethrough, and the inner periphery of the cylindrical portion 98b of the reflector pocket 91b is such as will gage the circle defined by the outer peripheries of the secondary sectoral projections I21, I28, I29 when the axial projections 5312 are in abutment with the front surface of the end flange 99b.

Assuming that the line connector I34 is connected to the contacts I30, I3I of the lamp 401) and the lamp has been disassembled from the reflector M1), the line connector I34 and its connected conductors (not shown) having been pulled through the aperture I00b of the reflector, a new lamp may be plugged into the line connector I34, if desired, and the lamp, such as 40b, is then brought to a position co-axial with the aperture I00b. The lamp 401)- is then moved axially rearwardly, and is rotationally so positioned that the sectoral ends of the fingers 55b, 56b, 51b will pass through the recesses Illlb, I025, I03b. Axial rearward movement is then continued until the axial projections 53b abut the front surface of the end flange 99b of the reflector. The lamp 40b is then rotated clockwise, as viewed from the front of the reflector, thereby causing the detents 59b to engage the leading margins of the recesses IOIb, I021), I031). Further clockwise rotation causes the detents 59b to ride up onto the rear surface of the end flange 99b and eventually to snap into the apertures I04b, bringing the parts to the position shown in Figures 15, 21, and 22. Here also it will be understood that when the detents 59b are seated on the 'margins of the apertures I041) the fingers 55b, 56b, 511) are under sufiicient stress to hold the axial projections 53?) of the positioning means 451) in firm engagement with the front surface of the end flange 99b.

Assuming that the lamp 401) is disassembled from the reflector MD and is positioned at the rear thereof and it is desired to assemble it with the reflector, the lamp is brought to a position coaxial with the aperture and moved axially frontwardly, bulb first, the lamp being rotational- 1y so positioned that the secondary sectoral projections I21, I28, I29 will pass through the recesses. Frontward axial movement is continued until the detents 59b abut the rear surface of the end flange 99b, and in case the positioning means 45b is not sufiiciently far frontward to clear the end flange 99b, this may be brought about by moving the lamp frontwardly slightly to put the biasing'means 461) under stress. The lamp is then rotated in a clockwise direction, as m'ewed from the rear of the reflector, thereby causing the axial projections 53b to ride onto the front surface of the end flange 991). Further rotation of the lamp 405 will cause the detents 59b to snap into the apertures I041), theparts then again assuming the position shown in Figures 15, 21, and 22.

It will be evident from the foregoing that the lamp 401) may be assembled with, and accurately positioned with respect to the reflector M1) by approach from either the front or the rear of the reflector; and from the assembled position, as shown in Figures 15 and 21, it may be disassem- 4I shown in Figure 6, with the exception that it against the reflector.

bled from the reflector by either withdrawing it frontwardly or rearwardly, irrespective of whether it has been assembled with the reflector by ap proach from the front or rear.

Referring to Figure 23, the embodiment of my invention here illustrated is shown as including an incandescent electric lamp 400, adapted to be suitably connected to a reflector 4Ic fragmentarily shown. The lamp is provided with a base 420, having a shell 43c, which in this instance also includes a lateral extension 440, comprising positioning means 450 combined with abiasing means 46a for biasing the positioning means The lateral extension 440 comprises a collar 41c surrounding the shell 43c and a radially extending flange 480 on the collar. The collar 410 may be fastened to the shell 430 in any suitable manner, as by solder 490. The flange 430 is here shown as continued radially outwardly in the form of three sectoral projec tions I40, I4I, I42 (forming part of the positioning means 450) here shown as unequally circumferentially spaced, and as of unequal circumferential extent. Extending axially rearwardly from the sectoral projections I40, I4I, I42 are three arcuate flanges I43, the outer peripheries of which define a cylinder. Extending radially outwardly from the rear margins of the arcuate flanges I43 are three secondary sectoral projections I44, I45, I46. The radial axes of symmetry of the secondary sectoral projections I44, I46 are here shown as less than 120 apart and the radial axis of symmetry of the projection I45 approximately bisects the angle between the axes of symmetry of the projections I44, I46. The peripheral arcs of the secondary sectoral projections I44, I45, I46 define a circle. The peripheral arc of the sectoral projections I44, I46 are equal, and that of the projection I45 is larger than either of the other two I 44, I46). Here shown as centrally located on the secondary sectoral projections I44, I45, I46 are axially frontwardly extending projections 53c, conveniently formed by making indentations 540 on the rear surfaces of the projections I44, I45, I46. I

y In the general plane of and integral with the flange 48c, and interposed circumferentially between the sectoral projections I40, I4I, I42 are three radially extending fingers 55c, 56c, 510. These fingers are here shown as of uniform width, and desirably have arched portions I I to increase their actual length, though their radial length is such that their peripheral margins are in the circle defined by the outer peripheries of the secondary sectoral projections I44, I45, I46. It will be evident that if desired the ends of the fingers 55c, 56c, 510 may be made of sectoral form to correspond to the secondary sectoral projections I44, I45, I46, analogously to the relation between, the ends of the fingers 55b, 56b, 51b, and the secondary sectoral projections I21, I28, I29.

As here shown, the axes of symmetry of the fingers 55c, 510 are spaced less than apart, to the same angle as the axes of symmetry of the secondary sectoral projections I44, I46, and the axis of symmetry of the finger 56c approximately bisects the angle between the axes of symmetry of the other fingers, 55c, 510. The fingers 55c, 56c, 510 are here shown as provided with centrally located rearwardly extending dome-shaped projections or detents 50c conveniently formed by making indentations 600 in the opposite sides of the fingers. The detents 59c are he e shown as nonoyclic with each other and with the axial projections 530.

The lamp is here shown as provided with a pair of butt-type contacts lilo, 620 which are cooperable with a pair of contacts 630, 640 on a contact carrier I48. The contact carrier I48 is here shown as comprising a generally cylindrical shell I43 provided at its front end with vunequally circumferentially spaced hooks I50,

I5I', I52, the inner and outer peripheral surfaces of which are, .in this instance, extensions of the surfaces of the shell I49. One of the hooks is shown in detail in Figure 27,-and as these hooks are similar to the hooks I0, II, I2 of the contact carrier 65, differing therefrom merely in size, no further description is necessary. The contacts 630, 640 of the contact carrier I48 are spring pressed and constructed and arranged just' as are the contacts 63, 64 of the contact carrier 65 of the embodiment of Figure 1.

For cooperation with the hooks I50, I5I, I52, the flange 480 is here shown as provided with three unequally circumferentially spaced compound apertures I53, I54, I55, similar to the compound apertures I01, I08, I09 in the reflector M of the embodiment of Figure 1. It will be apparent that the hooks I50, I5I, I52 may be inserted through the entrance portions of the corresponding apertures I53, I54, I55 against the bias of the springs 93c, and brought into c00perative relation with the seats of the compound apertures, as shown in detail in Figure 27, in a manner analogous to that described in connection with the hooks I0, II, I2 and the apertures I06, I01, I08. Thus, in the embodiment of Figure 23 the contact carrier I48 will be carried by the lamp 400.

The reflector Me is identical with the reflector 4Ia (shown in Figure 12) of the embodiment of Figure 10, with the exception that no compound apertures such as I06a, I0'Ia, I08a are necessary, and also, apertures I04c, for cooperation with the detents 590, are disposed, differently than the apertures I04a, to accommodate the change in relation as between the positioning means 450 and biasing means 460 on the one hand, and the positioning means 450 and biasing means 46a on the other. The relation of the recesses I2Ic, I220, I230 to the set of fingers with its base presented toward the reflector. The

lamp is then moved axially rearwardly, and is, so positioned rotationally, that the secondary sectoral projections I44, I45, I46 will pass through the recesses I2Ic, I220, I230. The lamp is then moved further axially, the projections I44, I45, I46 passing through recesses I2I,c, I220, I230,

and the arcuate flanges I43 slipping into the reflector aperture I000, and the detents 500 com ing into contact with the front surface of the flat portion I200 of the reflector. 'If necessary to bring the secondary sectoral projections I44, I 45, I46 to a position of axial clearance with respect to the rear face of the flat portion I20 of the reflector, the fingers 55c, 56c, 51c may be put under a slight stress by pressing the lamp rearwardly, and the lamp is then rotated clockwise, as viewed from the front of the reflector, thereby causing the axial projections 536 to ride onto the rear surface of the flat portion I We of the reflector, and eventually causing the detents 59c to snap into the apertures IM-c, bringing the parts to the position shown in Figures 23, 26, and 29, in which the filaments 95c, 960 will be accurately positioned with respect to the reflector c, as will be apparent. It will be understood that when the detents 590 are seated on the margins of the apertures I040 in the position of the parts shown in Figures 23, 26, and 29, the fingers 55c, 56c, 510 are under sufiicient stress to hold the axial projections 530 of the positioning means in firm engagement with the rear face of the flat portion I 200 of the reflector.

The lamp 400 may be assembled with the reflector Me by approach from the rear of the reflector, as follows. The lamp is brought to a position coaxial with the aperture I000, at the rear of the reflector and is then moved, bulb first, frontwardly, and is rotationally so positioned that the fingers 55c, 56c, 510 will pass through the recesses I2Ic, I220, I230. Axial frontward movement is then continued, the arcuate flanges I43 slipping into the reflector aperture I000, until the axial projections 53c abut the rear surface of the flat portion I200 of the reflector. The lamp is then rotated clockwise, as viewed from the rear of the reflector thereby causing the detents 590 to engage the leading margins of the recesses I2lc, I220, I230. Further clockwise rotation causes the detents 590 to ride up onto the front surface of the flat portion I200 and eventually to snap into the apertures I040, bringing the parts to the position shown in Figures 23, 26, and 29.

It will be evident from the foregoing that, as in the case of the lamp 4% of the embodiment of Figure 15, the lamp 400 may be assembled with the reflector Me by approach from either the front or the rear of the reflector; and from the assembled position, as shown in Figures 23 and 26, it may be disassembled from the reflector by either drawing it frontwardly or rearwardly, irrespective of whether it has been assembled with the reflector by approach from the front or rear. Also the contact carrier I 48 may be manipulated in a manner analogous to that already set forth in connection witlr the line conneetor I34 of the embodiment of Figure 15.

From the foregoing it will be apparent to those skilled in the art that each of the illustrated cmbodiments of my invention provides a new and improved electric lighting device and unit, readily and conveniently constructed and assembled, and accordingly, each accomplishes the principal object of my invention. On the other hand,,it also will be obvious to those skilled in the art that the illustrated embodiments of my invention may be variously changed and modified, or features thereof, singly or collectively, embodied in other combinations than those illustrated,

without departing from the spirit of my invention, or sacrificing all of the advantages thereof, and that accordingly, the disclosure herein is illustrative only, and my invention is not limited thereto.

I claim:

1. In combination: an incandescent electric lamp having a base; mounting means for said lamp; laterally extending positioning, means on said base, constructed and arranged to abut said mounting; biasing means constructed and arranged to press said positioning means into abutment with said mounting; said positioning means and said biasing means being constructed integral with each other from a single sheet metal stamp- 2. In combination: an incandescent electric lamp having a base; mounting means for said lamp; laterally extending positioning means on said base, constructed and arranged to abut said mounting at one side thereof; biasing means constructed and arranged to abut the other side of said mounting and to press said positioning means into abutment with said mounting; said positioning means and said biasing means being constructed integral with each other from a single sheet metal stamping.

3. An incandescent electric lamp, comprising: a base having a lateral extension for abutting a mounting, said lateral extension including two sets of circumfercntially spaced radially extending projections, said sets being in different planes.

and having a predetermined angular relation with each other.

4. Incombination: an incandescent electric lamp having a base; mounting means for said lamp, said mounting means having an aperture having a plurality of circumferentially spaced radially extending recesses; laterally extending positioning means unitary with said base, abut tingsaid mounting at one side thereof; biasing means unitary with said base, having portions insertable through said recesses and abutting said mounting at the other side thereof circumferentially between said recesses, constructed and arranged to press said positioning means into abut- I cesses; biasing means unitary with said base and having portions abutting said mounting at the other side thereof; said biasing means being con-. structed and arranged to press said positioning means into abutment with said mounting; said positioning means and said biasing means being integral with each other; and said aperture being of sufficient size to pass said bulb.

6. An incandescent electric lamp, comprising: a base having a lateral extension for abutting a mounting, said lateral extension including two sets of circumferentlally spaced radially extending projections, said sets being in different planes and having a predetermined angular relation with each other, and said sets being integral with each other.

7. An incandescent electric lamp, comprising: a base having a lateral extension for abutting a mounting, said lateral extension including two sets of circumferentially spaced radially extending projections, said sets being in different planes and having a predetermined angular relation with each other, and one of said sets being relatively rigid and another of said sets being relatively flexible.

8. An incandescent electric lamp, comprising:

a base; a lateral extension unitary with said base; said lateral extension including a positioning element and a resilient biasing element integral with ,each other, and the outer end portions of said elements defining adjacent general planes substantially parallel and transverse to the axis of said lamp.

9. An incandescent electric lamp, comprising: a base; a lateral extension unitary with said base; and said lateral extension including two sets of projections each set comprising a plurality of radially extending projections, said sets being inte ral with each other, and one of said sets being flexible.

10. An incandescent electric lamp, comprising:

a base; a lateral extension unitary with said base;

and said lateral extension including two sets of radially extending circumferentially spaced projections, said sets being constructed integral with each other from a single sheet metal stamping, one of said sets being flexible and the other set relatively rigid, said sets defining difi'erent general planes and said relatively rigid set comprising three such projections.

11. An incandescent electric lamp, comprising: a base; a lateral extension unitary with said base; and said lateral extension including two sets of projections, each set comprising three radially extending circumferentially spaced projections, said sets being constructed integral ,with each other from a single sheet metal stamping, one of said sets being flexible and the other set relatively rigid, said sets defining difierent general planes.

12. An incandescent electric lamp, comprising: a base; a lateral extension unitary with said base; and said lateral extension including two sets of radially extending circumferentially spaced projections, said sets being constructed integral with each other from a single sheet metal stamping, one of said sets being flexible and the other set relatively rigid, said sets being in different general planes, the projections of one set alternating circumierentially with the projections of the other set.

13. An incandescent electric lamp, comprising: a base; a lateral extension on said base; and said lateral extension including two sets of projections, each set comprising three radially extending circumferentially spaced projections, said sets being constructed integral with each other from a single sheet metal stamping, one of said sets being flexible and the other set relatively rigid, said sets defining different general planes, the projections of one set alternating circumferentially with the projections of the other set.

' 14. An incandescent electric lamp, comprising: a base having a lateral extension for abutting a mounting, said lateral extension including two sets of circumferentially spaced radially extending projections, said sets being constructed integrally from a single sheet metal stamping, and said sets being in different planes and having a. predetermined angular relation with each other.

15. In combination: an incandescent electric lamp having a base; a mounting for said lamp, said mounting having an aperture; laterally extending positioning means unitary with said base; constructed and arranged to abut said mounting; biasing means constructed and arranged to press said lateral extension into abutment with said mounting; said positioning means and said biasing means being constructed integral with each other from a single sheet metal stamping; and said aperture on the one hand and said positioning means and said biasing means on the other being so constructed and arranged that at least one of said means has portions insertable through said aperture to make bayonet connection with ing a base provided with lamp contact means; v laterally extending positioning means unitary with said base, constructed and arranged to abut said mounting; biasing means constructed and arranged to press said positioning means into abutment with said mounting; said positioning means and said biasing means being constructed integral with each other from a single sheet metal stamping; and a carrier, carrying contact means constructed and arranged for detachable cooperation with said lamp contact means.

17. In combination: an incandescent electric lamp having a base; a reflector for said lamp; positioning means, including a lateral extension unitary with said base, constructed and arranged to register with said reflector at three circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflectors; biasing means constructed and arranged to press said positioning means into register with said reflector; said positioning means and said biasing means being constructed integral with each other. e

18. In combination: an incandescent electric lamp having a base; a reflector for said lamp; positioning means, including a lateral extension unitary with said base; constructed and arranged to register with said reflector, at one side thereof, at three circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; biasing means constructed and arranged to abut the other side of said mounting and to press said positioning means into register with said reflector; said positioning means and said biasing means being constructe integral with each other.

19. In combination: an incandescent electric lamp having a base; a reflector for said lamp; said reflector having an aperture; positioning means, including a lateral extension unitary with said base, constructed and arranged to register with said reflector at three circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; biasing means constructed and arranged to press said lateral extension into register with said reflector; said positioning means and said biasing means being constructed integral with each other; and bayonet connection means between said lamp and said reflector, said bayonet connection means comprising portions of at least one of said positioning means and said biasing means constructed and arranged to pass through said aperture.

20. In combination: an incandescent electric lamp; a mounting having an aperture through which the bulb of saidlamp is insertable; means for connecting said lamp to said mounting; said connecting means comprising a lateral extension unitary with said base and abutting said mounting at one side thereof, and resilient means unitary with said base, constructed and arranged to press said lateral extension against said mounting; said resilient means having at least a part thereof disposed at the other side of said mounting; contact means on said lamp base; and carrying means, carrying contacts cooperable with said lamp contact means, so constructed and arranged that it is movable from cooperative relation while leaving said lamp connected unitary with said base, and constructed integral with each other from a single sheet metal stamping; said positioning means including a portion abutting said support at one side thereof; said biasing means including a portion abutting said support at the other side thereof and being constructed and arranged to press said positioning means into abutment with said support.

22. In combination: an incandescent electric lamp having a base; a support for said lamp; connecting means making bayonet connection between said lamp and said support; said con- .necting means comprising positioning means and biasing means, unitary with said base, and constructed integral with each other from a single sheet metal stamping; said positioning means including a portion abutting said support at one side thereof; said biasing means including a portion abutting said mounting at the other side thereof and being constructed and arranged to press said positioning means into abutment with said support; said bayonet connecting means comprising a bayonet aperture in said support and one of said portions constructed and arranged to make bayonet connection with said aperture.

23. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having a first portion extending transversely to the axis of said lamp and a second portion defining a circle about the axis of said lamp; positioning means, including a lateral extension unitary with said base, constructed and arranged to abut said first portion of said reflector at one side thereof, constructed and arranged to position the direction of the axis of said lamp with respect to said reflector, and said lateral extension having a portion disposed in and gaged by said second portion of said reflector to position said lamp laterally with respect to said reflector; biasing means unitary with said base, abutting said reflector at the other side, constructed and arranged to press said positioning means into abutment with said reflector; and said positioning means and said biasing means being integral with each other.

24. In combination: an incar iescent electric lamp having a base; mounting means for said lamp, said mounting means having an aperture 'having a plurality of circumferentially spaced radially extending recesses; laterally extending positioning means unitary with said base, abutting said mounting at one side thereof; said positioning means including a portion disposed in and gaged by a portion of said mounting means to position said lamp laterally with respect to said mounting means; biasing means unitary with said base, having portions insertable through said recesses and abutting said mounting at the other side thereof circumferentially between said recesses, constructed and arranged to press said positioning means into abutment with said mounting; and said positioning means and said biasing means being integral with each other.

25. In combination: an incandescent electric lamp having a bulb and a base; mounting means for said lamp, said mounting means having an aperture having a plurality of circumferentially spaced radially extending recesses; laterally extending positioning means unitary with said base, having portions insertable through said recesses and abutting portions of said mounting at one side thereof circumferentially between said recesses; said positioning means including a portion disposed in and gaged by a portion of said mounting means to position said lamp laterally with respect to said mounting means; biasing means unitary with said base and having portions abutting said mounting at the other side thereof; said biasing means being constructed and arranged to press said positioning means into abutment with said mounting; said positioning means and said biasing means being integral with each other; and said aperture being of sufficient size to pass said bulb.

26. In combination: an incandescent electric lamp having a bulb and a base; mounting means for said lamp, said mounting means having an aperture having a plurality of circumferentially spaced radially extending recesses; laterally extending positioning means on said base, havin portions insertable through said recesses and abutting portions of said mounting circumferentially between said recesses; biasing means constructed and arranged to press said positioning means into abutment with said mounting; said positioning means and said biasing means being so constructed and arranged that they are unitary with said base; and said aperture being of suflicient size to pass said bulb.

27. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having an aperture through which said base is insertable; laterally extending positioning means on said base, abutting said reflector at one side thereof at a plurality of circumferentially spaced points; biasing means, abutting said reflector at the other side thereof, constructed and arranged to press said positioning means into abutment with said reflector; said positioning means and said biasing means being constructed and arranged so that they are unitary with said base; and bayonet connection means between said lamp and said reflector comprising a, plurality of circumferentially spaced radially outwardly extending portions on said biasing means and a plurality of circumferentially spaced recesses extending radially outward from the margin of said aperture, said bayonet connection means being so constructed and arranged that said portions are bodily insertable through said recesses by axial movement of said lamp, and by subsequent rotation of said lamp brought into abutment with said other side of said reflector as aforesaid.

28. In combination: an incandescent electric lamp having a bulb and a base; a reflector for said lamp, said reflector having an aperture through which the bulb of saidlamp is insertable;

connection means between said lamp and said refiector comprising a plurality of circumferentially spaced portions on said positioning means and a plurality of circumferentially spaced recesses extending radially outward from the margin of said aperture, said bayonet connection means being so constructed and arranged that said portions :are bodily insertable through said recesses by axial movement of said lamp, and by subsequent rotation of said lamp brought into abutment with said side of said reflector as aforesaid. 29. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having an aperture; positioning means, unitary with said lamp, constructed and arranged to position said lamp with respect to said reflector; said positioning means including a lateral extension having axially extending flange means so constructed and arranged that it is gaged by said aperture to position said lamp laterally with respect to said reflector and having also radial flange means extending radially outwardly from said axially extending flange means and abutting a lateral face of said reflector at a plurality of circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; and biasing means, unitary with said lamp, comprising a resilient portion, abutting said reflector at the other lateral face thereof, so constructed and arranged that it is flexible in a direction toward and away from said reflector and presses said radial flange means into abutment with said reflector as aforesaid.

30. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having an aperture; positioning means, unitary with said lamp, constructed and arranged to position said lamp with respect to said reflector; said positioning means including a lateral extension having axially extending flange means so constructed and arranged that it is gaged by said aperture to position said lamp laterally with respect to said reflector and having also radial flange means extending radially outwardly from said axially extending flange means and abutting a lateral face of said reflector at a plurality of circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; biasing means, unitary with said lamp, comprising a resilient portion, abutting said reflector at the other lateral face thereof, so constructed and arranged that it is flexible in a direction toward and away from said reflector and presses said radial flange means into abutment with said reflector as aforesaid; and bayonet connection means between at least one .of said positioning means and said biasing means on the one hand and said reflector n the other comprising a plurality of circum,

ferentially spaced recesses extending radially outwardly from said aperture and a plurality of circurnferentially spaced projections, forming a part of at least one of said means, bodily insertable, from one side of said reflector, through said recesses by axial movement of said lamp, and by rotation of said lamp brought to a position between said recesses at the other side of said reflector.

31. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having an aperture; positioning means, unitary with said lamp, constructed and arranged to position said lamp with respect to said reflector; said positioning means including a lateral extension having axially extending flange means so constructed and arranged that it is gaged by said aperture to position said lamp laterally with respect to said reflector and having also radial flange means extending radially said reflector having an aperture;

outwardly from said axially extending flange means and abutting a lateral face of said reflector at a plurality of circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; biasing means'unitary with said lamp, comprising a resilient portion, abutting said reflector at the other lateral face thereof, so constructed and arranged that it is flexible in a direction toward and away from said reflector and presses said radial flange means into abutment with said reflector as afore-' said; and bayonet connection means between said biasing means and said reflector comprising a plurality of circumferentially spaced recesses extending radially outwardly from said aperture and a plurality of circumferentially spaced projections, forming a part of said biasing means, bodily insertable, from one side of said reflector, through said recesses by axial movement of said lamp, and by rotation of said lamp brought to a position between said recesses at the other side of said reflector.

32. In combination: an incandescent electric lamp having a base; a reflector for said lamp, positioning means, unitary with said lamp, constructed and arranged to position said lamp with respect to said reflector; said positioning means including a lateral extension having axially extending flange means so constructed and arranged that it is gaged by said aperture to position said lamp laterally with respect to said reflector and having also radial flange means extending radially outwardly from said axially extending flange means and abutting a lateral face of said reflector at a plurality of circumferentially spaced points to position the direction of the axis ofsaid lamp with respect to said reflector; biasing means, unitary with said lamp, comprising a resilient portion, abutting said reflector at the other lateral face thereof, so constructed and arranged that it is flexible in a direction toward and away from said reflector and presses said radial flange means into abutment with said reflector as aforesaid; and bayonet connection means between said positioning means and said reflector comprising a plurality of circumferentially spaced recesses extending radially outwardly from said aperture and a plurality of circumferentially spaced pro jections forming a part of said positioning means, bodily insertable, from one side of said reflector. through said recesses by axial movement of said lamp, and by rotation of said lamp brought to a position between said recesses at the other side of said reflector.

33. In combination: an incandescent electric lamp having a base; a reflector for said lamp, said reflector having an aperture; positioning means, unitary with said lamp, constructed and arranged to position said lamp with respect to said reflector; said positioning means including a lateral extension having axially extending flange means so constructed and arranged that it is gaged by said aperture to position said lamp laterally with respect to said reflector and having also radial flange means extending radially outwardly from said axially extending flange means and abutting a lateral face of said reflector at a plurality of circumferentially spaced points to position the direction of the axis of said lamp with respect to said reflector; biasing means, unitary with said lamp, comprising a resilient portion, abutting said reflector at the other lateral faee'thereo f, so constructed and arranged that it is flexible in a direction toward and away resent No. 2,117,761.

from said reflector and presses said radial flange means into abutment with said reflector as aforesaid; and bayonet connection means between both said positioning means and said biasing means on the one hand and said reflector on' the other comprising a plurality of circumferentially spaced recesses extending radially outwardly from said aperture and a set of a plurality of circumierentialiy spaced projections forming a part of each of said positioning means and said biasing means respectively. either set being bodily insertable, from one side of said reflector, through said recesses by axial movement of said lamp, and by rotation of said lamp brought to a position between said recesses at the other side of said reflector.

34. An incandescent electric lamp, comprising: base-means; said base-means including a lateral CERTIFICATE OF CORRECTION extension; flange means on said lateral'extension, the periphery of said flange means deflning a cylinder; and said base-means including also a resilient element unitary with said base-means and extending outwardly in a general plane transverse to the axis of said lamp, said resilient element being flexible in planes including the axis of said lamp.

35. An incandescent electric lamp, comprising: a base; and positioning means unitary with said base and including a lateral extension having axially extending flange means deflning a cylindrical surface; radial flange means extending radially outwardly from said axially extending flange means, and a plurality of circumferentially spaced projections extending axially from said radial flange means.

HARRY A. DOUGLAS.

May 17 1958 HARRY A DOUGIA S It is hereby certified that error appears in the printed specification of the above numberedpatent requiring correction as follows: Page 6, second 7 column, line 1, for the word "noncyclic" read concyclic; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 5th day of July, A. D. 1958.

(Seal) Henry Van Arsdale 1 Acting Commissioner of Patents.

resent No. 2,117,761.

from said reflector and presses said radial flange means into abutment with said reflector as aforesaid; and bayonet connection means between both said positioning means and said biasing means on the one hand and said reflector on' the other comprising a plurality of circumferentially spaced recesses extending radially outwardly from said aperture and a set of a plurality of circumierentialiy spaced projections forming a part of each of said positioning means and said biasing means respectively. either set being bodily insertable, from one side of said reflector, through said recesses by axial movement of said lamp, and by rotation of said lamp brought to a position between said recesses at the other side of said reflector.

34. An incandescent electric lamp, comprising: base-means; said base-means including a lateral CERTIFICATE OF CORRECTION extension; flange means on said lateral'extension, the periphery of said flange means deflning a cylinder; and said base-means including also a resilient element unitary with said base-means and extending outwardly in a general plane transverse to the axis of said lamp, said resilient element being flexible in planes including the axis of said lamp.

35. An incandescent electric lamp, comprising: a base; and positioning means unitary with said base and including a lateral extension having axially extending flange means deflning a cylindrical surface; radial flange means extending radially outwardly from said axially extending flange means, and a plurality of circumferentially spaced projections extending axially from said radial flange means.

HARRY A. DOUGLAS.

May 17 1958 HARRY A DOUGIA S It is hereby certified that error appears in the printed specification of the above numberedpatent requiring correction as follows: Page 6, second 7 column, line 1, for the word "noncyclic" read concyclic; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 5th day of July, A. D. 1958.

(Seal) Henry Van Arsdale 1 Acting Commissioner of Patents. 

